Command history...

I have some suggestions for the command history:

1. I often type a lisp expression in at the command prompt. It would be very useful to me if they could be recalled from the command history.
2. Occasionally I make a mistake typing a command. I would find it useful if I could recall the invalid command and edit it.
3. There are many time I want to run a command a few times with similar inputs but not enough to make a script. Here it would be useful to have the user input history (i.e. coordinates or relative coordinates) available.

Hope they are considered generally useful.